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tb is the standardmail, but if i want to open an e-mail always mac mail open it.

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if i klick to open e-mails (saved in my local folders) always mac "mail" opens the mail. if i want to open with tb to many steps like: mark the mail -select "open with" than i can choose tb. btw -mac "mail" is marked as standard, but in tb preferences i selected tb as standard ?!. thanks in advance,

if i klick to open e-mails (saved in my local folders) always mac "mail" opens the mail. if i want to open with tb to many steps like: mark the mail -select "open with" than i can choose tb. btw -mac "mail" is marked as standard, but in tb preferences i selected tb as standard ?!. thanks in advance,
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Once you saved mail outside Thunderbird folders you need to set the default program to open files in your operating system.